论文标题
部分可观测时空混沌系统的无模型预测
Synthetic Axion Response with Spacetime Crystals
论文作者
论文摘要
在这里，我们表明，时空调制为实现复杂的非重点耦合提供了令人兴奋的途径，尤其是难以捉摸的轴响应。我们开发出一种分析形式主义，以在长波长极限下均质化各向异性时空晶体。发现具有合适的滑动旋转对称性的时空晶体可以具有巨大的轴心型响应，几个数量级比天然材料大。非偏轴轴响应可能在光学元件中具有有趣的应用，例如电磁隔离，另外可能会引起令人兴奋的新形式的轻波相互作用。
Here, we show that spacetime modulations provide an exciting route to realize complex nonreciprocal couplings, and in particular the elusive axion response. We develop an analytical formalism to homogenize anisotropic spacetime crystals in the long wavelength limit. It is found that spacetime crystals with suitable glide-rotation symmetry can have a giant axion-type response, several orders of magnitude larger than in natural materials. The nonreciprocal axion response may have interesting applications in optics, for example in electromagnetic isolation, and in addition may enable exciting new forms of light-wave interactions.
